The ideal pressure for a refrigerator's compressor can vary depending on the make and model of the refrigerator.
Refrigerators are complex appliances, and the pressure requirements depend on several factors, including the type of refrigerant used and the design of the system. To determine the correct pressure for your specific refrigerator model, you should refer to the manufacturer's documentation or consult a professional technician or service manual.
Adjusting the pressure of the compressor is a task that should only be performed by a trained and qualified technician, as it requires specialized knowledge and tools to ensure proper functioning and safety. If you suspect an issue with your refrigerator, it's best to reach out to a professional repair service to diagnose and resolve the problem.